<!-- Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/publicdomain/zero/1.0/ -->
<html>
<head>
  <title>CSSOM test</title>

  <script>
    "use strict";
    window.onload = function () {
      let x = document.styleSheets[0];
      x.insertRule("div { color: seagreen; }", 1);
    };
  </script>

  <style>
    span { }
  </style>
</head>
<body>
  <div id="target"> the ocean </div>
</body>
</html>
